Another presentation I've made not too long ago at an Israel Oracle User Group meeting was about a relatively little known product (at least by Oracle terms) called Oracle Virtual Directory. OVD allows for Enterprise Level LDAP without synchronization. Oracle Virtual Directory provides LDAP and XML views of existing enterprise identity information without synchronizing or moving data from its native locations. OVD can connect to pretty much anything JAVA can connect to and expose several different LDAP directories and RDMBS data repositories as a single LDAP tree. Think about it. You can virtually "unify" all the different directories in your organizations (be it RDBMS servers or LDAP directories) as a single directory service - which is so much easier to work with and develop for. Without any sort of synchronization. Very very cool. You can get my presentation here. OVD is availiable for download, free, from OTN.